Paint recycling and supplying system

Abstract

The utility model belongs to the technical field of paint recovery systems, and particularly relates to a paint recovery and supply system which is used for realizing efficient utilization and environment-friendly recovery of waste paint and comprises a recovered paint conveying system, a diluent conveying system, a flushing system, a mixing and proportioning system and a paint supply system, the recovered paint conveying system is used for conveying waste paint to the mixing and proportioning system; the diluent conveying system is used for conveying a diluent to the mixing and proportioning system and the flushing system; the flushing system is used for cleaning the paint flow channel by using a diluent; the mixing and proportioning system is used for mixing and proportioning the recycled paint and the diluent which flow in; the paint supply system is used for spraying the mixed and proportioned qualified paint; according to the method, the waste paint can be efficiently recycled, the resource utilization rate is increased, the environmental pollution risk is remarkably reduced, and the method is an important measure for promoting green manufacturing and sustainable development.

Description

Technical Field

[0001] The utility model belongs to the technical field of paint recovery systems, in particular to a paint recovery and paint supply system. Background Art

[0002] Waste paint mainly comes from industrial production, construction, home decoration and auto repair. In these processes, a large amount of waste paint is generated due to various reasons (such as expiration, surplus, construction errors, etc.). Waste paint contains harmful substances such as volatile organic compounds (VOCs) and heavy metals. If dumped or discharged at will, it will pollute the soil, water sources and air, affecting the ecological environment and human health. The pigments, resins, solvents and other ingredients in paint are all valuable resources. If waste paint is not effectively utilized, it will result in a waste of resources. As a common industrial waste, its treatment and recycling are of great significance to environmental protection and resource reuse. The treatment and recycling of waste paint is an important environmental protection task. Utility Model Content

[0003] In response to the shortcomings of the existing technology, the utility model provides a paint recovery and paint supply system. Through the coordination of the recovered paint delivery system, the diluent delivery system, the flushing system, the mixing and proportioning system and the paint supply system, the efficient reuse of waste paint can be achieved, solving the problems in the above background.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a paint recovery and paint supply system, which is used to achieve efficient utilization and environmentally friendly recycling of waste paint, including a recovered paint conveying system, a diluent conveying system, a flushing system, a mixing and proportioning system and a paint supply system; the recovered paint conveying system is used to convey waste paint to the mixing and proportioning system; the diluent conveying system is used to convey the diluent to the mixing and proportioning system and the flushing system; the flushing system uses the diluent to clean the paint flow channel; the mixing and proportioning system is used to mix and proportion the incoming recovered paint and diluent; the paint supply system is used to spray the qualified paint after mixing and proportioning; when the recycled paint enters the mixing and proportioning system through the recovered paint conveying system, the diluent conveying system conveys the diluent to the mixing and proportioning system, mixes and proportions the recovered paint and diluent, and the qualified paint after the mixing and proportioning is completed is sprayed through the paint supply system.

[0005] Preferably, the mixing and proportioning system includes a proportioning barrel, the proportioning barrel is connected to a first diaphragm pump, the output end of the first diaphragm pump is connected to a first three-way valve, a density flowmeter is arranged between the first diaphragm pump and the first three-way valve, one side end of the first three-way valve is fixedly connected to the proportioning barrel, and the other end of the first three-way valve is connected to the paint supply system.

[0006] Preferably, the paint recovery conveying system includes a paint recovery tank, the paint recovery tank is connected to a second diaphragm pump, the output end of the second diaphragm pump is connected to a 30US filter, the outlet end of the 30US filter is connected to a second three-way valve, one end of the side of the second three-way valve is connected to a waste liquid bucket, and the other end of the second three-way valve is connected to a proportioning bucket.

[0007] Preferably, the diluent delivery system includes a diluent stock liquid barrel, the diluent stock liquid barrel is connected to a third diaphragm pump, the output end of the third diaphragm pump is connected to a diluent barrel, the diluent barrel and the proportioning barrel are connected to each other, and a diaphragm valve is provided between the diluent barrel and the proportioning barrel.

[0008] Preferably, the paint supply system includes a paint liquid barrel, the paint liquid barrel is connected to a fourth diaphragm pump, the output end of the fourth diaphragm pump is connected to a paint supply barrel, the paint supply barrel is connected to a first three-way valve, a 10 / 5 / 1US filter is arranged between the paint supply barrel and the first three-way valve, the paint supply barrel is connected to a fifth diaphragm pump, the output end of the fifth diaphragm pump is connected to a spray gun, and a 2 / 1US filter is arranged between the fifth diaphragm pump and the spray gun.

[0009] Preferably, the paint supply bucket and the proportioning bucket are both provided with a pneumatic agitator, a pointer thermometer and a static pressure ultrasonic level gauge, an insulated water pipe is provided between the paint supply bucket and the proportioning bucket, and the insulated water pipe is provided with a temperature control proportional valve and an air-cooled temperature controller.

[0010] Preferably, the flushing system includes a sixth diaphragm pump connected to the diluent barrel, and the output end of the sixth diaphragm pump is connected to the flusher.

[0011] Preferably, when the density flowmeter detects that the paint density is qualified, the paint enters the paint bucket through the first three-way valve for reuse; when the density flowmeter detects that the paint density is unqualified, the paint flows back to the mixing bucket through the first three-way valve for re-mixing and proportioning.

[0012] Compared with the existing technology, the beneficial effects of the present invention are as follows: The paint recovery and paint supply system proposed in the present invention can achieve efficient reuse of waste paint through the cooperation of the recovered paint delivery system, the diluent delivery system, the flushing system, the mixing and proportioning system and the paint supply system, which not only improves resource utilization, but also significantly reduces the risk of environmental pollution. It is an important measure to promote green manufacturing and sustainable development.

[0013] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of a paint recovery and paint supply system.

[0015] Figure 2 This is a schematic diagram of the mixing and proportioning system structure of a paint recovery and paint supply system.

[0016] Figure 3 This is a structural schematic diagram of the diluent delivery system of a paint recovery and paint supply system.

[0017] Figure 4 The following is a structural diagram of a paint supply system for a paint recovery and supply system.

[0018] In the figure: 1. Paint recovery conveying system; 11. Paint recovery tank; 12. Second diaphragm pump; 13. 30US filter; 14. Second three-way valve; 15. Waste liquid barrel; 2. Diluent conveying system; 21. Thinner stock barrel; 22. Third diaphragm pump; 23. Diluent barrel; 24. Diaphragm valve; 3. Flushing system; 31. Sixth diaphragm pump; 32. Flusher; 4. Mixing and proportioning system; 41. Proportioning barrel; 42. First diaphragm Pump; 43. First three-way valve; 44. Density flowmeter; 5. Paint supply system; 51. Paint concentrate barrel; 52. Fourth diaphragm pump; 53. Paint supply barrel; 54. 10 / 5 / 1US filter; 55. Fifth diaphragm pump; 56. Spray gun; 57. 2 / 1US filter; 6. Pneumatic agitator; 7. Pointer thermometer; 8. Static pressure ultrasonic level gauge; 9. Insulated water pipe; 91. Temperature control proportional valve; 92. Air-cooled temperature controller. DETAILED DESCRIPTION

[0019] The following is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are intended to illustrate the present invention but are not intended to limit the scope of the present invention. All other embodiments obtained by persons of ordinary skill in the art without creative effort are intended to fall within the scope of protection of the present invention.

[0020] Combine Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, a paint recovery and paint supply system is used to achieve efficient utilization and environmentally friendly recycling of waste paint, including a recycled paint delivery system 1, a diluent delivery system 2, a flushing system 3, a mixing and proportioning system 4, and a paint supply system 5; the recycled paint delivery system 1 is used to deliver waste paint to the mixing and proportioning system 4; the diluent delivery system 2 is used to deliver diluent to the mixing and proportioning system 4 and the flushing system 3; the flushing system 3 uses diluent to clean the paint flow channel; the mixing and proportioning system 4 is used to mix and proportion the incoming recycled paint and diluent; the paint supply system 5 is used to spray qualified paint after mixing and proportioning; when the recycled paint enters the mixing and proportioning system 4 through the recycled paint delivery system 1, the diluent delivery system 2 delivers the diluent to the mixing and proportioning system 4 to mix and proportion the recycled paint and diluent, and the qualified paint after mixing and proportioning is sprayed through the paint supply system 5. Specifically, a paint recovery and paint supply system promotes the deep integration of resource recycling and environmental protection, not only achieving efficient reuse of waste paint, but also significantly reducing the negative impact on the environment. The recycled paint delivery system 1 is the starting point of the entire recycling process, ensuring that waste paint does not leak or solidify during transportation. Equipped with intelligent monitoring devices, the system monitors paint flow, viscosity, and composition in real time, providing accurate data for subsequent mixing and proportioning. Furthermore, to prevent potential impurities in the paint from damaging the system, a primary filtration device is installed to ensure the quality of the paint entering the mixing and proportioning system. The diluent delivery system 2 is responsible for accurately delivering the appropriate amount of diluent to the mixing and proportioning system 4 and flushing system 3. The diluent is selected based on the specific properties of the recycled paint to achieve optimal dilution and mixing uniformity. A precision metering pump and closed-loop control system ensure precise adjustment of the diluent ratio to meet diverse mixing requirements. Flushing system 3 is designed specifically for cleaning paint delivery pipelines and mixing and proportioning equipment. It utilizes efficient diluent circulation and flushing technology to effectively remove residual paint, prevent pipe blockage, and prevent equipment corrosion. The diluent waste liquid after flushing is collected and properly treated to meet environmental emission standards before being discharged or reused. Mixing and proportioning system 4 utilizes advanced stirring technology and an intelligent control system to precisely blend the recycled paint and thinner. Equipped with an online quality inspection device, this system monitors the performance of the mixed paint in real time, ensuring the stability and consistency of the final product. The paint supply system 5 is responsible for delivering the qualified, mixed paint to the spray equipment, ensuring efficient and uniform spraying. High-pressure pumping technology and precision flow control valves ensure a stable paint supply and excellent spray quality. The supply system also features pressure regulation and temperature control to adapt to varying spraying environments and process requirements.In summary, this paint recycling system achieves efficient recycling and reuse of waste paint through highly integrated design and intelligent control. It not only improves resource utilization but also significantly reduces environmental pollution risks. It is an important measure to promote green manufacturing and sustainable development.

[0021] Combine Figure 1 and Figure 2 As shown, the mixing and proportioning system 4 includes a proportioning barrel 41, which is connected to a first diaphragm pump 42. The output end of the first diaphragm pump 42 is connected to a first three-way valve 43. A density flowmeter 44 is interposed between the first diaphragm pump 42 and the first three-way valve 43. One side end of the first three-way valve 43 is fixedly connected to the proportioning barrel 41, while the other end of the first three-way valve 43 is connected to the paint supply system 5. Specifically, the mixing and proportioning system 4 ensures that the recycled paint and thinner are mixed in a precise ratio to achieve the desired coating effect. The proportioning barrel 41 is made of corrosion-resistant material to accommodate the chemical properties of the paint and thinner. The proportioning barrel 41 is equipped with a pneumatic agitator 6, driven by a motor, to ensure thorough mixing of the paint and thinner during the mixing process, preventing stratification or sedimentation. Furthermore, the proportioning barrel 41 is equipped with a static pressure ultrasonic level gauge 8 to monitor the liquid level in the proportioning barrel 41 in real time, allowing for timely adjustment of the feed rate to prevent overflow or underproduction. The first diaphragm pump 42 serves as the power source, pumping the mixed liquid (a mixture of paint and thinner) from the mixing barrel 41 and delivering it to the subsequent pipeline. The operation of the first diaphragm pump 42 is precisely controlled by a control system, which automatically adjusts its speed and flow rate based on the liquid level in the mixing barrel 41 and the required mixing ratio. A density flowmeter 44 is installed between the first diaphragm pump 42 and the first three-way valve 43. It monitors the density of the mixed liquid in real time, thereby indirectly reflecting the paint-thinner mixing ratio. The density flowmeter 44 calculates the liquid density by measuring parameters such as the pressure difference or vibration frequency as the liquid flows through a specific area, and transmits this data to the control system. Based on a preset mixing ratio range, the control system determines whether the current mixing ratio meets the specified standard and adjusts the flow rate of the first diaphragm pump 42 or the diluent supply accordingly to ensure the accuracy of the mixing ratio. The first three-way valve 43 plays a crucial role in diverting and merging flows in the mixing and proportioning system. One end is connected to the output of the first diaphragm pump 42 to receive the mixed liquid; the other end is connected to the paint supply system 5 to deliver qualified mixed paint to the spray equipment. One side end is fixedly connected to the mixing tank 41, forming a circulation loop. During the mixing process, if the required mixing ratio is not achieved, the control system can adjust the opening and closing state of the first three-way valve 43 to return some or all of the mixed liquid to the mixing tank 41 for remixing until the preset mixing ratio is achieved. This not only improves mixing efficiency but also ensures the accuracy of the mixing ratio.

[0022] Combine Figure 1 、 Figure 3 and Figure 4 As shown, the paint recovery conveying system 1 includes a paint recovery tank 11, which is connected to a second diaphragm pump 12. The output end of the second diaphragm pump 12 is connected to a 30US filter 13. The outlet end of the 30US filter 13 is connected to a second three-way valve 14. One side end of the second three-way valve 14 is connected to a waste liquid bucket 15, and the other end of the second three-way valve 14 is connected to a mixing bucket 41. Specifically, the paint recovery conveying system 1 is designed to efficiently and safely transport waste paint from the recycling source to the mixing and proportioning system, while ensuring the purity of the paint and the stability of the system during the transportation process. The paint recovery tank 11 is used to collect and temporarily store waste paint. The second diaphragm pump 12 is responsible for extracting the waste paint from the paint recovery tank 11 and transporting it to subsequent processing equipment. The 30US filter 13 is installed at the output end of the second diaphragm pump 12 and is used to perform preliminary filtering treatment on the waste paint. The 30US filter 13 uses a micron-grade filter medium (such as a stainless steel mesh or ceramic membrane) to effectively remove large impurities, suspended matter, and particulate matter from the paint, improving paint purity and subsequent processing efficiency. The second three-way valve 14 serves to divert and select routes within the paint recycling system. One end is connected to the outlet of the 30US filter 13, receiving the initially filtered waste paint; the other end is connected to the mixing tank 41, conveying qualified waste paint to the mixing and proportioning system 4 for further processing. A side end is connected to the waste liquid tank 15, which is used to discharge waste paint directly into the waste liquid tank 15 in special circumstances (such as when the paint is severely contaminated or cannot be reused). The control system automatically or manually controls the opening and closing of the second three-way valve 14 based on preset conditions (such as paint quality and mixing ratio requirements), ensuring that the waste paint is conveyed and processed according to the established process.

[0023] Combine Figure 1 and Figure 3As shown, the diluent delivery system 2 includes a diluent tank 21 connected to a third diaphragm pump 22. The output of the third diaphragm pump 22 is connected to a diluent tank 23, which is interconnected with a mixing tank 41. A diaphragm valve 24 is provided between the diluent tank 23 and the mixing tank 41. Specifically, the diluent delivery system 2 is responsible for delivering diluent (also known as thinner or solvent) from a storage container to the mixing and matching system 4 for precise matching with the recycled paint. The diluent tank 21 stores undiluted diluent. The diluent tank 21 is typically equipped with a level gauge or level sensor to monitor the diluent level in real time for timely replenishment. The third diaphragm pump 22 is responsible for extracting the diluent from the diluent tank 21 and delivering it to the diluent tank 23. The operation of the third diaphragm pump 22 is precisely controlled by a control system, which automatically adjusts the pump speed and flow rate based on the diluent demand and delivery speed. The diluent tank 23 receives diluent from the third diaphragm pump 22 and stores it at the appropriate level. A diaphragm valve 24, located between the diluent tank 23 and the mixing tank 41, controls the direction and flow of the diluent. The diaphragm valve 24 utilizes a diaphragm structure, with mechanical or electrical control for opening and closing. During the mixing process, the control system precisely controls the opening degree and duration of the diaphragm valve 24 based on the preset mixing ratio and diluent demand, ensuring that the diluent flows into the mixing tank 41 at the desired ratio and rate.

[0024] Combine Figure 1 and Figure 4As shown, the paint supply system 5 includes a paint concentrate tank 51, which is connected to a fourth diaphragm pump 52. The output end of the fourth diaphragm pump 52 is connected to a paint supply tank 53, which is connected to a first three-way valve 43. A 10 / 5 / 1 US filter 54 is interposed between the two valves. The paint supply tank 53 is also connected to a fifth diaphragm pump 55, whose output end is connected to a spray gun 56. A 2 / 1 US filter 57 is interposed between the fifth diaphragm pump 55 and the spray gun 56. Specifically, the paint supply system 5 is responsible for delivering high-quality paint from storage to the spray gun 56, ensuring a smooth spraying operation and the quality of the final coating. The paint concentrate tank 51 is used to store unused, high-quality paint concentrate. It is typically equipped with a level gauge or sensor to monitor the paint level in real time and replenish it when needed. The fourth diaphragm pump 52 draws paint from the paint concentrate tank 51 and transfers it to the paint supply tank 53. The operation of the fourth diaphragm pump 52 is precisely controlled by a control system, which automatically adjusts the pump speed and flow rate according to the needs of the spraying operation. The paint supply tank 53 receives paint from the fourth diaphragm pump 52 and serves as a buffer for the paint supply system. The design of the paint supply tank 53 also needs to consider the connection method and sealing between the first three-way valve 43 and the fifth diaphragm pump 55 to ensure the safety and accuracy of the paint during the delivery process. A 10 / 5 / 1US filter 54 is installed between the paint supply tank 53 and the first three-way valve 43. The 10 / 5 / 1US filter 54 uses a high-precision filter screen that can effectively remove small particles, impurities, and bubbles in the paint, improving the paint's purity and spraying quality. The fifth diaphragm pump 55 further transfers the paint from the paint supply tank 53 to the spray gun 56. The operation of the fifth diaphragm pump 55 is precisely controlled by a control system, which automatically adjusts its speed and flow rate based on the spraying speed and spray volume of the spray gun 56. A 2 / 1US filter 57 is also installed between the fifth diaphragm pump 55 and the spray gun 56. The 2 / 1US filter 57 serves as a secondary filtration device to further remove fine particles and impurities from the paint, ensuring that the paint applied to the workpiece surface meets the highest quality standards.

[0025] Combine Figure 1 and Figure 2As shown, the paint supply bucket 53 and the mixing bucket 41 are both equipped with a pneumatic agitator 6, a pointer thermometer 7, and a static pressure ultrasonic level gauge 8. An insulated water pipe 9 is installed between the paint supply bucket 53 and the mixing bucket 41. This insulated water pipe 9 is equipped with a temperature-controlled proportional valve 91 and an air-cooled temperature controller 92. Specifically, in the paint supply and mixing system, both the paint supply bucket 53 and the mixing bucket 41 are equipped with a pneumatic agitator 6. Powered by compressed air, this agitator effectively prevents paint and thinner from stratifying, settling, or clumping within the buckets without introducing electricity or other potential sources of pollution. The pneumatic agitator 6 ensures that the paint or mixed liquid remains uniform within the buckets, thereby improving spraying quality and mixing accuracy. Both the paint supply bucket 53 and the mixing bucket 41 are equipped with a pointer thermometer 7. These pointer thermometers 7 visually display the real-time temperature of the liquid within the buckets, helping operators adjust temperature control measures promptly to prevent paint deterioration due to excessively high temperatures or mixing quality due to excessively low temperatures. A static pressure ultrasonic level gauge 8 is installed on the paint supply tank 53 and the mixing tank 41. This static pressure ultrasonic level gauge 8 utilizes the propagation characteristics of ultrasonic waves in liquids, calculating the liquid level by measuring the time difference between the emission and reflection of the ultrasonic wave. This provides real-time feedback of the liquid level information within the tank to the control system, enabling automated management and regulation. An insulated water pipe 9 is installed between the paint supply tank 53 and the mixing tank 41. Made of high-efficiency insulating material, this pipe reduces heat loss and maintains a constant temperature for the fluid within. Temperature control devices, such as a temperature-controlled proportional valve 91 and an air-cooled temperature controller 92, are also installed on the insulated water pipe 9. The temperature-controlled proportional valve 91 automatically adjusts the water flow rate based on the preset temperature value and the actual measured value, achieving precise temperature control. The air-cooled temperature controller 92 lowers the water temperature by circulating cooling air. When the temperature within the tank needs to be lowered, this can be achieved by adjusting the parameters of the air-cooled temperature controller 92. The temperature-controlled proportional valve 91 and the air-cooled temperature controller 92 ensure that the paint and the mixed liquid are always kept within the optimal temperature range during the storage and mixing process, thereby improving the quality of the paint and the accuracy of the mixing ratio.

[0026] Combine Figure 1 and Figure 3As shown, the flushing system 3 includes a sixth diaphragm pump 31 connected to the diluent barrel 23. The output of the sixth diaphragm pump 31 is connected to a flusher 32. Specifically, during paint color changes, equipment cleaning, or maintenance, the flushing system 3 uses diluent to thoroughly flush key components in the system, ensuring paint purity and proper system operation. The sixth diaphragm pump 31 safely and efficiently extracts diluent from the diluent barrel 23 and delivers it to subsequent flushing devices. The operation of the sixth diaphragm pump 31 is precisely controlled by a control system, automatically adjusting the pump speed and flow rate based on flushing requirements and diluent supply, ensuring effective flushing while avoiding resource waste. The flusher 32 receives the diluent from the sixth diaphragm pump 31 and sprays it at high pressure and high speed onto the components to be cleaned. The design of the flusher 32 fully considers cleaning effectiveness and coverage. It utilizes multiple nozzles or a rotating spray head to ensure that the diluent reaches and penetrates every corner of the components to be cleaned, thoroughly removing residual paint and impurities. In addition, the flusher 32 may also be equipped with accessories such as a regulating valve and a pressure gauge so that the operator can adjust the flushing pressure and flow rate according to actual needs. In actual operation, the start-up of the flushing system 3 is usually synchronized with the switching of the paint supply system 5 and the diluent delivery system 2. When it is necessary to change the paint color or clean the equipment, the control system will first stop the operation of the paint supply system 5 and start the diluent delivery system 2 to deliver the diluent to the diluent barrel 23. Subsequently, the control system will start the sixth diaphragm pump 31 to extract the diluent from the diluent barrel 23 and flush key components such as the spray gun 56, the proportioning barrel 41, and the paint supply barrel 53 through the flusher 32. During the flushing process, the operator can ensure the thoroughness of the cleaning by observing the flushing effect and adjusting the flushing parameters.

[0027] Combine Figure 1 、 Figure 2 and Figure 3As shown, when the density flowmeter 44 detects acceptable paint density, the paint flows through the first three-way valve 43 into the paint supply bucket 53 for reuse. If the density flowmeter 44 detects unacceptable paint density, the paint flows back through the first three-way valve 43 to the mixing bucket 41 for remixing and re-proportioning. Specifically, the density flowmeter 44 is a high-precision measuring instrument specifically designed to monitor paint density. It is typically installed at a key location in the paint delivery pipeline, accurately measuring the density of the paint flowing through the pipeline in real time and feeding the measurement results back to the control system. By comparing the preset density standard with the actual measured value, the control system can quickly determine whether the paint density meets the requirements and make appropriate handling decisions accordingly. When the density flowmeter 44 detects acceptable paint density, it means that the paint's mixing ratio and dilution level have met the preset standards and can be directly used for spraying. At this point, the control system issues a command to switch the first three-way valve 43 to the appropriate position, allowing the qualified paint to pass through and enter the paint supply bucket 53 for storage. The paint in the paint supply bucket 53 is then pumped by the fifth diaphragm pump 55 and supplied to the spray gun 56 for spraying, thus enabling paint reuse and efficient recycling. However, if the density flowmeter 44 detects that the paint density is substandard, this indicates an issue with the paint's mixing ratio or dilution level, requiring adjustment. In this case, the control system will issue a command, but this time switching the first three-way valve 43 to a different position, directing the substandard paint back into the mixing bucket 41. In the mixing bucket 41, the substandard paint is remixed with new diluent or paint concentrate until its density meets the required standard. This process may need to be repeated multiple times until the paint density fully meets the required standard. The entire paint density monitoring and adjustment process is highly automated and intelligently managed. By integrating advanced sensors, controllers, and actuators, the system monitors paint density changes in real time and automatically adjusts the paint flow direction and mixing ratio based on the monitoring results. This intelligent management approach not only improves the efficiency and quality of paint recovery and reuse, but also reduces the complexity and error rate of manual operations, providing strong support for the sustainable development of enterprises.

[0028] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A paint recovery and supply system for achieving efficient utilization and environmentally friendly recycling of waste paint, characterized in that: It includes a paint recovery conveying system (1), a diluent conveying system (2), a flushing system (3), a mixing and proportioning system (4) and a paint supply system (5); The recycled paint conveying system (1) is used to convey the waste paint to the mixing and proportioning system (4); The diluent delivery system (2) is used to deliver the diluent to the mixing and proportioning system (4) and the flushing system (3); Flushing system (3) Use thinner to clean the paint flow channel; The mixing and proportioning system (4) is used to mix and proportion the incoming recycled paint and thinner; The paint supply system (5) is used to spray the qualified paint after mixing and proportioning; When the recycled paint enters the mixing and proportioning system (4) through the recycled paint conveying system (1), the diluent conveying system (2) conveys the diluent to the mixing and proportioning system (4), and the recycled paint and the diluent are mixed and proportioned. After the mixing and proportioning is completed, the qualified paint is sprayed through the paint supply system (5).

2. A paint recovery and supply system according to claim 1, characterized in that: The mixing and proportioning system (4) includes a proportioning barrel (41), the proportioning barrel (41) is connected to a first diaphragm pump (42), the output end of the first diaphragm pump (42) is connected to a first three-way valve (43), a density flowmeter (44) is provided between the first diaphragm pump (42) and the first three-way valve (43), one side end of the first three-way valve (43) is fixedly connected to the proportioning barrel (41), and the other end of the first three-way valve (43) is connected to the paint supply system (5).

3. A paint recovery and supply system according to claim 2, characterized in that: The paint recovery conveying system (1) comprises a paint recovery tank (11), the paint recovery tank (11) is connected to a second diaphragm pump (12), the output end of the second diaphragm pump (12) is connected to a 30US filter (13), the outlet end of the 30US filter (13) is connected to a second three-way valve (14), one side end of the second three-way valve (14) is connected to a waste liquid bucket (15), and the other end of the second three-way valve (14) is connected to a proportioning bucket (41).

4. A paint recovery and supply system according to claim 3, characterized in that: The diluent delivery system (2) comprises a diluent stock liquid barrel (21), the diluent stock liquid barrel (21) is connected to a third diaphragm pump (22), the output end of the third diaphragm pump (22) is connected to a diluent barrel (23), the diluent barrel (23) and the proportioning barrel (41) are connected to each other, and a diaphragm valve (24) is provided between the diluent barrel (23) and the proportioning barrel (41).

5. A paint recovery and supply system according to claim 4, characterized in that: The paint supply system (5) includes a paint stock liquid barrel (51), the paint stock liquid barrel (51) is connected to a fourth diaphragm pump (52), the output end of the fourth diaphragm pump (52) is connected to a paint supply barrel (53), the paint supply barrel (53) is connected to a first three-way valve (43), a 10 / 5 / 1US filter (54) is provided between the paint supply barrel (53) and the first three-way valve (43), the paint supply barrel (53) is connected to a fifth diaphragm pump (55), the output end of the fifth diaphragm pump (55) is connected to a spray gun (56), and a 2 / 1US filter (57) is provided between the fifth diaphragm pump (55) and the spray gun (56).

6. A paint recovery and supply system according to claim 5, characterized in that: The paint supply bucket (53) and the proportioning bucket (41) are both provided with a pneumatic stirrer (6), a pointer thermometer (7) and a static pressure ultrasonic level gauge (8); an insulating water pipe (9) is provided between the paint supply bucket (53) and the proportioning bucket (41); and a temperature control proportional valve (91) and an air-cooled temperature controller (92) are provided on the insulating water pipe (9).

7. A paint recovery and supply system according to claim 6, characterized in that: The flushing system (3) includes a sixth diaphragm pump (31) connected to the diluent barrel (23), and the output end of the sixth diaphragm pump (31) is connected to the flusher (32).

8. The paint recovery and supply system according to claim 7, characterized in that: When the density flowmeter (44) detects that the paint density is qualified, the paint enters the paint supply bucket (53) through the first three-way valve (43) for reuse. When the density flowmeter (44) detects that the paint density is unqualified, the paint flows back through the first three-way valve (43) to the proportioning bucket (41) for re-mixing and proportioning.

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